A339770 Number of polyfetts (or polifetti) with n cells, distinguishing mirror images.

1, 15, 170, 2766, 46127, 811265, 14605298, 268039329

Offset: 1

Author

George Sicherman, Dec 16 2020

Keywords

• nonn
• hard
• more

Comments

A polyfett [polifetto] is a generalized polyabolo [polytan]. It is formed by joining isosceles right triangles on the quadrille grid along edges and at corners.

Examples

			For n=2 there are 4 diaboloes and 11 proper difetts, distinguishing mirror images.  See the link.
		

Links

• George Sicherman, Catalogue of Polyfetts

Crossrefs

Cf. A337867 (number of polyfetts with n cells, identifying mirror images).